is there any difference between dishs.i want satelite for my camper but refuse to pay them 50 bucks a month when i only need it 4-5 months a year.well a co-worker has dishnetwork and has an extra box.i said i would pay them the monthly rental on that extra box to use it for said 4-5 months.i have since picked up an rca dish(singal cable) and a dss dish(double cable) but can't seem to get a signal from the satelitte.i guess my questions are just how precise do i have to have my satelitte dish to recieve signals and do i need a dishnetwork dish to recieve said signal.i found a website which gave me coordinates for my location and i figure i'm pretty damn close,but still nothing.any help would be appreciated.